打开idea，创建一个project
打开文件目录下的pom.xml文件，添加下面的内容安装依赖，等待下载完成
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-mail</artifactId>
</dependency>打开src->main->resources->application.properties配置文件
添加邮箱账号、密码（这里使用的是qq邮箱的授权码）
spring.application.name=my-email-app
spring.mail.host=smtp.qq.com //指定邮箱的SMTP服务器地址
spring.mail.port=587 //SMTP服务端口号#邮箱账号
spring.mail.properties.mail.smtp.auth=true //启用SMTP身份验证（必须为true才能发送邮件）
spring.mail.properties.mail.smtp.starttls.enable=true //启用STARTTLS加密（确保邮件传输安全）
spring.mail.username=25xxxxxxx@qq.com //发件人邮箱
spring.mail.password=klptaxfztbtxxxx //邮箱授权码
spring.mail.default-encoding=utf-8 //防止中文乱码授权码在登录qq邮箱点击设置->账号->开启服务
在src->main->项目文件里面添加一个service包
添加一个SendMail.java文件
package com.qst.springbootjava4.service;
import jakarta.mail.MessagingException; // 添加这行
import jakarta.mail.internet.MimeMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.MailException;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
// 其他已有导入...
import java.io.File;@ComponentScan
@Service
public class SendMail {@Autowiredprivate JavaMailSenderImpl mailSender;@Value("${spring.mail.username}")private String from;public void sendSimpleEmail(String to,String subject,String text){//定制纯文本邮件信息对象SimpleMailMessage message=new SimpleMailMessage();message.setFrom(from);message.setTo(to);message.setSubject(subject);message.setText(text);//发送邮件mailSender.send(message);try{mailSender.send(message);System.out.print("成功");}catch (MailException e){System.out.print("失败");}}//复杂的邮件发送public void sendCompexEmail(String to,String subject,String text,String filePath){//定制复杂邮件信息对象MimeMessageMimeMessage message= mailSender.createMimeMessage();//使用MimeMessageHelper帮助类，并设置multipart多部件使用为truetry {MimeMessageHelper helper=new MimeMessageHelper(message,true);helper.setFrom(from);helper.setTo(to);helper.setSubject(subject);helper.setText(text);//设置邮件附件FileSystemResource file=new FileSystemResource(new File(filePath));String fileName=filePath.substring(filePath.lastIndexOf(File.separator));//发送邮件helper.addAttachment(fileName,file);mailSender.send(message);} catch (MessagingException e) {e.printStackTrace();}}}打开text文件添加
package com.qst.springbootjava4;import com.qst.springbootjava4.service.SendMail;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;@SpringBootTest
class Springbootjava4ApplicationTests {@Autowiredprivate SendMail sendMail; //自动注入邮件服务@Testpublic void testSendEmail() {String to = "251xxxxxxx5@qq.com"; //收件人邮件String subject = "验证邮件"; //邮件主题String text = "这是一封测试邮件，用于验证Spring Boot邮件发送功能。"; //邮件正文sendMail.sendSimpleEmail(to, subject, text);}@Testpublic void test02(){String to = "251xxxxxxx@qq.com"; //收件人String subject = "测试"; //主题String text="这是一个文件"; //正文String filePath="C:\\Users\\Administrator\\Desktop\\新建 DOC 文档.doc"; //附件路径sendMail.sendCompexEmail(to,subject,text,filePath);}
}运行代码后看邮箱
)
